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OMAP3: PM: Disable interrupt controller AUTOIDLE before WFI 

OMAP interrupt controller goes to unknown state when there is right
combination of l3,l4 sleep/wake-up transitions, l4 autoidle in
interrupt controller and some interrupt. When this happens, interrupts
are not delivered to ARM anymore and ARM will remain in WFI (wait for
interrupt) until interrupt controller is forced to wake-up
(i.e. lauterbach).

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Tero Kristo 2009-10-23 19:03:50 +03:00 committed by Kevin Hilman
parent b296c8118b
commit f18cc2ff5e
3 changed files with 16 additions and 0 deletions
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12
arch/arm/mach-omap2/irq.c
View File

@ -280,4 +280,16 @@ void omap3_intc_suspend(void)
/* A pending interrupt would prevent OMAP from entering suspend */
omap_ack_irq(0);
}
void omap3_intc_prepare_idle(void)
{
/* Disable autoidle as it can stall interrupt controller */
intc_bank_write_reg(0, &irq_banks[0], INTC_SYSCONFIG);
}
void omap3_intc_resume_idle(void)
{
/* Re-enable autoidle */
intc_bank_write_reg(1, &irq_banks[0], INTC_SYSCONFIG);
}
#endif /* CONFIG_ARCH_OMAP3 */

2
arch/arm/mach-omap2/pm34xx.c
View File

@ -392,6 +392,7 @@ void omap_sram_idle(void)
prm_set_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN);
omap3_enable_io_chain();
}
omap3_intc_prepare_idle();
/*
* On EMU/HS devices ROM code restores a SRDC value
@ -438,6 +439,7 @@ void omap_sram_idle(void)
OMAP3430_GR_MOD,
OMAP3_PRM_VOLTCTRL_OFFSET);
}
omap3_intc_resume_idle();
/* PER */
if (per_next_state < PWRDM_POWER_ON) {

2
arch/arm/plat-omap/include/plat/irqs.h
View File

@ -500,6 +500,8 @@ extern int omap_irq_pending(void);
void omap_intc_save_context(void);
void omap_intc_restore_context(void);
void omap3_intc_suspend(void);
void omap3_intc_prepare_idle(void);
void omap3_intc_resume_idle(void);
#endif
#include <mach/hardware.h>